LOVE.SEX now BLACKMAIL

Hello all thank you all respected people for reading my post and helping Me out I am 24 years old girl, and 4 years ago this guy started following Me and proposed Me I neglected him for.a year but he was so much behind Me that he forced Me convinced Me that I cannot live without you and finally tired of all his jazz I said yes to him Days went on he slowly started coming close to me I stopped him many times Again he started with the same story Then I later allowed him, one day he forcefully tried to have s*x with me I was very angry but kept quite.and did tell anyone because of fear, he apologised and convinced Me, I again kept mum and went around with him, Days passed and he used to bring gifts for me, then he used to take Me to a friends flat and we used to have s*x, and after a period of time I started liking him, everytime ,he took Me to that flat he brought gifts for me, also he took pictures of us when.we were doing s*x, I tried to stop him but he said he would delete them immediately, Now as iam into my post graduation I dont get time to meet the fellow, so now he calls Me every minute and harrases Me why r u not meeting Me and all He calls Me anytime at night 2 ,3 and harrrases Me abuses Me for hours, and asks me to meet him or he says he will tell my parents about this or commit suicide. One day he called and said that if u dont meet Me I will expose ur nude pics with me on Facebook, from that day on I am so scared and . Don't now what should I do because I dobt want to continue any relation with him ,also 2 years ago my parents came to know about this affair and they scolded Me and went to his parents and told them also ,he kept quite Fo. 10 months and again contacted Me and we started meeting again But today I realized that it was my biggest mistake. Now his threatening phone calls and harrasment is at so high level that I am scared to go out of my house I think I should commit suicide I dont know what should I do Can this be legally stopped, can I stop him from posting my pics with him Can I live a free life Plz help me plz